Mimicing an SR-25

[Taldin]

The last few years I've had the opportunity to shoot two of my friend's SR-25s. While Knight only guaranteed 1 MOA they tend to shoot well under that, and these shot about 3/8 MOA. I was drilling poker chips way out and my friends (who shoot much better than I and had much more time with the guns) were doing double tap headshots out to 600 meters or so, beating many of the guys with their tuned 700's.

With the various wars on, Knight's not releasing many to civilians and the cost has skyrocketed. That and finding this site about the same time got me wanting to build up something of similar caliber rather than just building a decent shooter.

A big part of it is the tight fit and finish of everything, including upper to lower, at the sacrifice of carefree interchangability. (Yeah, and match ammo only, etc)

Are any of the 10-80% (or even complete I suppose Khalan perhaps) lowers oversized enough to allow that part of the tight fit required for the upper and lower marriage? Are there uppers (forgings or otherwise) suitable for such hand fitting work?

Such a tight, accurate, project seems a natural for this group. Thoughts? Interest?

[jwh02017]

Don't quote me on this, but I believe Khalan.com might be able to build you a "tight" fit AR upper and lower set.

Justin

[The Law]

Well, we don't have any AR10 type lowers to do that with, but I'm also in the process of building something with a 1/2 MOA in an AR10 style rifle.

As for AR15 type rifles, we have some several occasions made custom lowers that would fit extremely tight to a specific upper.  Before we do this for a custom we do usually go over some other custom services we do to "accurize" rifles in a sense.  We built one of our Khalan Pro rifles for the law enforcement precision marksmen course and the biggest goal was to ensure there was no wiggle/play from butt to muzzle.  It ended up being an extremely tight rifle. 

[sjc80]

If I could get my hands on an Sr-25 lower and upper and blueprints would anyone be interested in machining out some 10%-80% pieces? The SR-25 is really what i want and they are just so damn expensive and so damn hard to get hold of to purchase. As i think of it, we should be able to extrapolate/interpolate the upper using an AR-10 upper blueprint and the SR-25 lower blueprint.

[jwh02017]

If you can get the blueprints, I can make it 

Justin

[sjc80]

I will do my best.

[paco_ramirez]

I could definitely use those blueprints as well if you don't mind.

[bookwurm99]

i'll take them too.

[Heli]

Please add me to your list for the prints too.


 

[rich]

me too if they become avail , I have the back half of a demilled sr25 lower but thats about it

[cornholio1]

In for blueprints

[Lawdog734]

 New guy here. I'll be honest in that I don't have much knowledge in machine work, but luckily have a few friends that do.
 I've got a Mk11 Mod0 and would love to be able to have another upper for it to build up into something similar to the new Battle Rifle. The problem is as everyone else has suggested-getting spare components from KAC is a first class pain in the rear.

 What I'd like to see from those with superior knowledge than I, would be an SR25 looking upper receiver that will take a DPMS barrel extension as well as the bolt and carrier (if they are different). The DPMS barrel extension is slightly smaller than the KAC unit and while it will work, it won't be as tight as is desirable and could cause accuracy problems.
 The other thing I'd like to see is a Mk11 gas block. Everybody wants one, but KAC won't sell them and nobody has stepped up to the plate to offer something similar.
 If someone wants to do a lower, it might be easier to have a lower that looks similar to the KAC lower-but that will accept Armalite or DPMS parts. The KAC bolt catch and possibly the takedown pins are different and I figure it would be easier to get the readily available small parts from the above 2.

 If someone is in Georgia wants to use the rifle to get all the dimensions needed to reproduce the parts, I'd be happy to offer it up provided they could help me out with getting the components I'd like. I'd even consider sending to someone out of state as long as I could be assured I'd get it back quickly as it is my work rifle.

[paco_ramirez]

Howdy, Deputy 

[mikeh]

The DPMS barrel extensions and barrels nuts are different.  AR10's are apparently the same though....

[sysops666]

Any updates on this? I ask cause it seems that SHOT show has a couple of new things for sr25 owners and not for armalite

I'm sure you all know about the 308 magpul pmags comming out, only for the dpms/sr25 pattern, no ar10.

And the thing that personally killed me was LMT's 308 mrp, Built to be used off of a sr25 based lower.

Now few here know that I am a lower receiver whore (that didn't sound right), but the thought of KAC not selling to civilians...... or more correctly... putting more emphasis on military orders than civilian ones, hurts!

No sr25 lower means no mrp goodness!

But then again I'm ranting again....  don't mind me.

so *ahem* are there any updates onthe sr25 blueprints? 

[limeytwo]

I have both an Armalite AR10 and an SR25 the uppers are basically the same other than the pins on the SR25 are fractionally larger, .281 vs .275 I think, I think that any one that could/would produce a lower that copies the SR25/Late AR10 format that uses the SR25/DPMS style mags woulds be onto a winner as many people like the AR10 uppers but would like to use the fast becoming standard SR25/DPMS magazines, the only problem I would see is most people don't have the capability to finish a 10 or may be even a 80% receiver,

[gastonglock21s]

I know this thread is old but I'm just getting going in possibly building a .308.  I too like the lines of the AR-10 lower and would like to use the KAC,DPMS,PMAG mags as well.  Seems like almost everyone agrees on this point.  I'd like to build something soon and would like to know if anyone has updates on this topic?

Limey - Are the pivot and takedown pin locations the same only larger on the SR-25?